These illustrations show basic sample injection techniques using Valco two
position valves. With rare exceptions, there is no difference between switching
valves and external volume sampling valves, so the same valve can be used for
either function.

The unique advantage of 8 and 10 port valves is that they reduce extra column volume by
combining sampling and switching functions in a single valve. This minimizes expense,
maintenance, service, and risk of leaks as compared to multiple 6 port valve systems.

Format descriptions

Static: side-by-side view of valve in each position, much like in our print catalog

JavaScript: one position is shown at a time, with the position changed by a mouse click